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/* $NetBSD: atomic_sub.S,v 1.3 2014/06/23 21:53:45 joerg Exp $ */
/*-
* Copyright (c) 2007 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include "atomic_op_asm.h"
.text
.align 2
ENTRY(_atomic_sub_32)
movl 4(%sp), %a0
movl 8(%sp), %d0
subl %d0, (%a0)
rts
END(_atomic_sub_32)
ATOMIC_OP_ALIAS(atomic_sub_32,_atomic_sub_32)
ATOMIC_OP_ALIAS(atomic_sub_int,_atomic_sub_32)
STRONG_ALIAS(_atomic_sub_int,_atomic_sub_32)
ATOMIC_OP_ALIAS(atomic_sub_long,_atomic_sub_32)
STRONG_ALIAS(_atomic_sub_long,_atomic_sub_32)
ATOMIC_OP_ALIAS(atomic_sub_ptr,_atomic_sub_32)
STRONG_ALIAS(_atomic_sub_ptr,_atomic_sub_32)
ENTRY(_atomic_sub_32_nv)
movl 4(%sp), %a0
1: movl (%a0), %d0
movl %d0, %d1
subl 8(%sp), %d0
casl %d1, %d0, (%a0)
bne 1b
movl %d0, %a0 /* pointers return also in %a0 */
rts
END(_atomic_sub_32_nv)
ATOMIC_OP_ALIAS(atomic_sub_32_nv,_atomic_sub_32_nv)
ATOMIC_OP_ALIAS(atomic_sub_int_nv,_atomic_sub_32_nv)
STRONG_ALIAS(_atomic_sub_int_nv,_atomic_sub_32_nv)
ATOMIC_OP_ALIAS(atomic_sub_long_nv,_atomic_sub_32_nv)
STRONG_ALIAS(_atomic_sub_long_nv,_atomic_sub_32_nv)
ATOMIC_OP_ALIAS(atomic_sub_ptr_nv,_atomic_sub_32_nv)
STRONG_ALIAS(_atomic_sub_ptr_nv,_atomic_sub_32_nv)
CRT_ALIAS(__sync_sub_and_fetch_4,_atomic_sub_32_nv)
ENTRY(__sync_fetch_and_sub_4)
movl 4(%sp), %a0
1: movl (%a0), %d0
movl %d0, %d1
subl 8(%sp), %d1
casl %d0, %d1, (%a0)
bne 1b
movl %d0, %a0 /* pointers return also in %a0 */
rts
END(__sync_fetch_and_sub_4)
ENTRY(_atomic_sub_16_nv)
movl 4(%sp), %a0
1: movw (%a0), %d0
movw %d0, %d1
subw 8(%sp), %d0
casw %d1, %d0, (%a0)
bne 1b
rts
END(_atomic_sub_16_nv)
CRT_ALIAS(__sync_sub_and_fetch_2,_atomic_sub_16_nv)
ENTRY(__sync_fetch_and_sub_2)
movl 4(%sp), %a0
1: movw (%a0), %d0
movw %d0, %d1
subw 8(%sp), %d1
casw %d0, %d1, (%a0)
bne 1b
rts
END(__sync_fetch_and_sub_2)
ENTRY(_atomic_sub_8_nv)
movl 4(%sp), %a0
1: movb (%a0), %d0
movb %d0, %d1
subb 8(%sp), %d0
casb %d1, %d0, (%a0)
bne 1b
rts
END(_atomic_sub_8_nv)
CRT_ALIAS(__sync_sub_and_fetch_1,_atomic_sub_8_nv)
ENTRY(__sync_fetch_and_sub_1)
movl 4(%sp), %a0
1: movb (%a0), %d0
movb %d0, %d1
subb 8(%sp), %d1
casb %d0, %d1, (%a0)
bne 1b
rts
END(__sync_fetch_and_sub_1)
CRT_ALIAS(__atomic_fetch_sub_1,__sync_fetch_and_sub_1)
CRT_ALIAS(__atomic_fetch_sub_2,__sync_fetch_and_sub_2)
CRT_ALIAS(__atomic_fetch_sub_4,__sync_fetch_and_sub_4)
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